This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
This law was proposed by Ritcher in 1792. It states that 'when two different elements combine separately with the same weight of a third element, the ratio of the masses in which they do so will be the same or some simple multiple of the mass ratio in which they combine with each other'. For example, oxygen and sulphur react with copper to give copper oxide and copper sulphide respectively. Suphur and oxygen also react with each other to give SO2. Then, In CuS, Cu:S = 63.5:32 In CuO, Cu:O = 63.5:16 S:O = 32:16 S:O = 2:1 Now in SO2 S:O = 32:32 S:O = 1:1 Thus the ratio between the two ratios is 2:1